STEVENS MICHAEL. (1990). PRACTICAL PROBLEM SOLVING FOR MANAGERS. UNIVERSAL BOOKS.
Lua i Stíl Chicago (17ú heag.)STEVENS MICHAEL. PRACTICAL PROBLEM SOLVING FOR MANAGERS. NEW DELHI: UNIVERSAL BOOKS, 1990.
Lua MLA (9ú heag.)STEVENS MICHAEL. PRACTICAL PROBLEM SOLVING FOR MANAGERS. UNIVERSAL BOOKS, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.